JPS5586043A - Cathode frame structure for electron tube - Google Patents

Cathode frame structure for electron tube

Info

Publication number
JPS5586043A
JPS5586043A JP15882478A JP15882478A JPS5586043A JP S5586043 A JPS5586043 A JP S5586043A JP 15882478 A JP15882478 A JP 15882478A JP 15882478 A JP15882478 A JP 15882478A JP S5586043 A JPS5586043 A JP S5586043A
Authority
JP
Japan
Prior art keywords
layer
empty
empty hole
coil
frame structure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP15882478A
Other languages
Japanese (ja)
Other versions
JPS6238819B2 (en
Inventor
Osamu Yamazaki
Tadashi Shimizu
Ryozo Akiyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP15882478A priority Critical patent/JPS5586043A/en
Publication of JPS5586043A publication Critical patent/JPS5586043A/en
Publication of JPS6238819B2 publication Critical patent/JPS6238819B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Microwave Tubes (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

PURPOSE: To prevent a surface carbonized layer from being deteriorated and make the life of cathode structure long by specifying the size and density of the empty hole in the carbonized layer which is formed on the surface of the coil-shaped heating filament in a W-ThO2 alloy, within a preset range.
CONSTITUTION: The coil-shaped heating filament 1 of cathode structure which is used in electron tubes such as magnetrons uses the W alloy containing ThO2 by 0.5W4.0 weight percentage as a base material. A bedded organization of W2C and W is formed on the surface. The initial size of the empty hole which constitutes a surface carbonized layer contributing to electron emission and which exists in the C layer is less than 5μm. For the empty hole density, the number of empty holes with a diameter of 3μm or more is less than 100 per mm2. Further, it is proper that the thickness of the W2C layer should by some 10W60μm.
COPYRIGHT: (C)1980,JPO&Japio
JP15882478A 1978-12-22 1978-12-22 Cathode frame structure for electron tube Granted JPS5586043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15882478A JPS5586043A (en) 1978-12-22 1978-12-22 Cathode frame structure for electron tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15882478A JPS5586043A (en) 1978-12-22 1978-12-22 Cathode frame structure for electron tube

Publications (2)

Publication Number Publication Date
JPS5586043A true JPS5586043A (en) 1980-06-28
JPS6238819B2 JPS6238819B2 (en) 1987-08-19

Family

ID=15680174

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15882478A Granted JPS5586043A (en) 1978-12-22 1978-12-22 Cathode frame structure for electron tube

Country Status (1)

Country Link
JP (1) JPS5586043A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3316609A1 (en) * 1982-05-12 1983-11-17 Varian Associates, Inc., 94303 Palo Alto, Calif. GRID CONTROLLED POWER ELECTRON TUBES

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH041122U (en) * 1990-04-12 1992-01-07

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5568047A (en) * 1978-11-16 1980-05-22 Toshiba Corp Cathode structure for electron tube

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5568047A (en) * 1978-11-16 1980-05-22 Toshiba Corp Cathode structure for electron tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3316609A1 (en) * 1982-05-12 1983-11-17 Varian Associates, Inc., 94303 Palo Alto, Calif. GRID CONTROLLED POWER ELECTRON TUBES

Also Published As

Publication number Publication date
JPS6238819B2 (en) 1987-08-19

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